Analysis of the effects of controlled shot peening on fatigue damage of high strength aluminium alloys

The use of two micro-mechanical models for notch sensitivity and fatigue life allowed the development of boundary conditions that would evaluate potential life improvement after controlled shot peening (CSP) in high strength aluminium alloys. The boundary conditions describe the state of equal weight between surface roughening and residual stresses and the implication of material and loading parameters. From the boundary conditions, the performance of CSP on crack arrest and fatigue life can be investigated.